Subject ASC000117z

The Quarterly journal of the Geological Society of London.
v.56 (1900), Page 429 (1900)
Smithsonian Libraries
BHL Page 41487781

Keywords

geology builth lower ludlow wenlock llandovery ordovician carneddau hill geological sketch map builth district map Builth rivers rock type Ludlow strata Wales E.M.R. Wood Wenlock Sketch Lower Ludlow Llandovery Ordovician Carneddau Geology

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